I want to change a column type from VARCHAR to BIGINT. All values currently stored in the column are integers. Saving column data, recreating the column and restoring data seems to be too convoluted. Besides, I have multiple constraints declared on this column, which I will have to recreate once the column is dropped. I wonder if the easiest way to do this would be just to change the atttypid in pg_attribute?
I also wonder why it is possible to declare an FK constraint on a column of type VARCHAR to reference a PK column of type BIGINT?
Thanks.
Oleg
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